diff --git a/tests/math/testpivector2d.cpp b/tests/math/testpivector2d.cpp
new file mode 100644
index 00000000..9a42f8ed
--- /dev/null
+++ b/tests/math/testpivector2d.cpp
@@ -0,0 +1,88 @@
+#include "gtest/gtest.h"
+#include "pivector2d.h"
+
+int ROWS_COUNT_INIT = 3;
+int ROWS_COUNT_INCREASE = 4;
+int ROWS_COUNT_REDUCE = 2;
+
+int COLS_COUNT_INIT = 3;
+int COLS_COUNT_INCREASE = 4;
+int COLS_COUNT_REDUCE = 2;
+
+void assert_fill_with(PIVector2D<int> vec, int rows, int cols) {
+	for(int r = 0; r < rows; r++) {
+		for(int c = 0; c < cols; c++) {
+			ASSERT_EQ(vec.element(r, c), r * COLS_COUNT_INIT + c);
+		}
+	}
+}
+
+class Vector2D : public ::testing::Test {
+protected:
+	PIVector2D<int> vec = PIVector2D<int>(ROWS_COUNT_INIT, COLS_COUNT_INIT);
+
+	void SetUp() override {
+		for (int r = 0; r < ROWS_COUNT_INIT; ++r) {
+			for (int c = 0; c < COLS_COUNT_INIT; ++c) {
+				vec.element(r, c) = r * COLS_COUNT_INIT + c;
+			}
+		}
+	}
+
+	void resize_reduce_is_data_stay_consistent(int newRowsCount, int newColsCount) {
+		piCout << "Before:";
+		piCout << vec;
+		piCout << "";
+		vec.resize(newRowsCount, newColsCount, 0);
+		piCout << "After:";
+		piCout << vec;
+		assert_fill_with(vec, newRowsCount, newColsCount);
+	}
+
+	void resize_increase_is_data_stay_consistent(int newRowsCount, int newColsCount) {
+		vec.resize(newRowsCount, newColsCount, 0);
+		assert_fill_with(vec, ROWS_COUNT_INIT, COLS_COUNT_INIT);
+
+		for (int r = ROWS_COUNT_INIT; r < newRowsCount; ++r) {
+			for (int c = COLS_COUNT_INIT; c < newColsCount; ++c) {
+				ASSERT_EQ(vec.element(r, c), 0);
+			}
+		}
+	}
+};
+
+TEST_F(Vector2D, resize_is_increase_col_count) {
+	vec.resize(ROWS_COUNT_INIT, COLS_COUNT_INCREASE, 0);
+	ASSERT_EQ(vec.cols(), COLS_COUNT_INCREASE);
+}
+
+TEST_F(Vector2D, resize_is_reduce_col_count) {
+	vec.resize(ROWS_COUNT_INIT, COLS_COUNT_REDUCE, 0);
+	ASSERT_EQ(vec.cols(), COLS_COUNT_REDUCE);
+}
+
+TEST_F(Vector2D, resize_is_increase_rows_count) {
+	vec.resize(ROWS_COUNT_INCREASE, COLS_COUNT_INIT, 0);
+	ASSERT_EQ(vec.rows(), ROWS_COUNT_INCREASE);
+}
+
+TEST_F(Vector2D, resize_is_reduce_rows_count) {
+	vec.resize(ROWS_COUNT_REDUCE, COLS_COUNT_INIT, 0);
+	ASSERT_EQ(vec.rows(), ROWS_COUNT_REDUCE);
+}
+
+TEST_F(Vector2D, resize_increase_both_is_data_stay_consistent) {
+	resize_increase_is_data_stay_consistent(ROWS_COUNT_INCREASE, COLS_COUNT_INCREASE);
+}
+
+TEST_F(Vector2D, resize_reduce_cols_is_data_stay_consistent) {
+	resize_reduce_is_data_stay_consistent(ROWS_COUNT_INIT, COLS_COUNT_REDUCE);
+}
+
+TEST_F(Vector2D, resize_reduce_rows_is_data_stay_consistent) {
+	resize_reduce_is_data_stay_consistent(ROWS_COUNT_REDUCE, COLS_COUNT_INIT);
+}
+
+TEST_F(Vector2D, resize_reduce_both_is_data_stay_consistent) {
+	resize_reduce_is_data_stay_consistent(ROWS_COUNT_REDUCE, COLS_COUNT_REDUCE);
+}
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